<?php
/**
 * Create group OR edit group settings.
 *
 * @copyright &copy; 2006 The Open University
 * @author N.D.Freear AT open.ac.uk
 * @author J.White AT open.ac.uk
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package groups
 */

require_once('../config.php');
require_once('lib.php');
require_once('group_form.php');

/// get url variables
$courseid = optional_param('courseid', 0, PARAM_INT);
$id	   = optional_param('id', 0, PARAM_INT);
$delete   = optional_param('delete', 0, PARAM_BOOL);
$confirm  = optional_param('confirm', 0, PARAM_BOOL);

// This script used to support group delete, but that has been moved. In case
// anyone still links to it, let's redirect to the new script.
if($delete) {
	redirect('delete.php?courseid='.$courseid.'&groups='.$id);
}

if ($id) {
	if (!$group = get_record('groups', 'id', $id)) {
		error('Group ID was incorrect');
	}
	$group->description = clean_text($group->description);
	if (empty($courseid)) {
		$courseid = $group->courseid;

	} else if ($courseid != $group->courseid) {
		error('Course ID was incorrect');
	}

	if (!$course = get_record('course', 'id', $courseid)) {
		error('Course ID was incorrect');
	}

} else {
	if (!$course = get_record('course', 'id', $courseid)) {
		error('Course ID was incorrect');
	}
	$group = new object();
	$group->courseid = $course->id;
}

require_login($course);
$context = get_context_instance(CONTEXT_COURSE, $course->id);
require_capability('moodle/course:managegroups', $context);

$returnurl = $CFG->wwwroot.'/group/index.php?id='.$course->id.'&amp;group='.$id;

if ($id and $delete) {
	if (!$confirm) {
		print_header(get_string('deleteselectedgroup', 'group'), get_string('deleteselectedgroup', 'group'));
		$optionsyes = array('id'=>$id, 'delete'=>1, 'courseid'=>$courseid, 'sesskey'=>sesskey(), 'confirm'=>1);
		$optionsno  = array('id'=>$courseid);
		notice_yesno(get_string('deletegroupconfirm', 'group', $group->name), 'group.php', 'index.php', $optionsyes, $optionsno, 'get', 'get');
		print_footer();
		die;

	} else if (confirm_sesskey()){
		if (groups_delete_group($id)) {
			redirect('index.php?id='.$course->id);
		} else {
			print_error('erroreditgroup', 'group', $returnurl);
		}
	}
}

/// First create the form
$editform = new group_form();
$editform->set_data($group);

if ($editform->is_cancelled()) {
	redirect($returnurl);

} elseif ($data = $editform->get_data()) {

	if ($data->id) {
		if (!groups_update_group($data, $editform->_upload_manager)) {
			error('Error updating group');
		}
	} else {
		if (!$id = groups_create_group($data, $editform->_upload_manager)) {
			error('Error creating group');
		}
		$returnurl = $CFG->wwwroot.'/group/index.php?id='.$course->id.'&amp;group='.$id;
	}

	redirect($returnurl);
}

$strgroups = get_string('groups');
$strparticipants = get_string('participants');

if ($id) {
	$strheading = get_string('editgroupsettings', 'group');
} else {
	$strheading = get_string('creategroup', 'group');
}


$navlinks = array(array('name'=>$strparticipants, 'link'=>$CFG->wwwroot.'/user/index.php?id='.$courseid, 'type'=>'misc'),
				  array('name'=>$strgroups, 'link'=>$CFG->wwwroot.'/group/index.php?id='.$courseid, 'type'=>'misc'),
				  array('name'=>$strheading, 'link'=>'', 'type'=>'misc'));
$navigation = build_navigation($navlinks);

/// Print header
print_header_simple($strgroups, ': '.$strgroups, $navigation, '', '', true, '', navmenu($course));

echo '<div id="grouppicture">';
if ($id) {
	print_group_picture($group, $course->id);
}
echo '</div>';
$editform->display();
print_footer($course);
?>
